When the apocalypse happened and Caitlin Meadows was forced to survive on the run with Jack Booker, she didn't expect them to go a week without tearing each other's heads off. And she certainly didn’t think that they would fall in love with each other. But now she can’t imagine life without him and is ready to do anything to save the life of her loved one in this world infested with zombies. In trying to find their friends, Caitlin and Booker have to cross bleak landscape to find a secret group of survivors who may have the answers they need. But zombies, desperate supply hunters and disease are not the only threats in this harsh new reality. The clock is ticking. When will their time expire?